1) A median of a triangle is a segment from a vertex to the midpoint of the opposite side. The medians of any triangle are concurrent at the centroid.
2) An altitude of a triangle is a perpendicular segment from a vertex to the opposite side. The three altitudes of a triangle are concurrent at the orthocenter.
3) This document discusses properties of medians and altitudes of triangles, including using the centroid and orthocenter to solve problems involving lengths of segments and finding coordinates of special points like the centroid and orthocenter. Examples are provided to illustrate these concepts.
Dr. DAVID BERNSTEIN, PhD em Medicina e Toxicologia Ambiental pelo Instituto de Medicina Ambiental da Universidade de Nova Iorque e título de mestre de Ciências em Física pela Universidade da Cidade de Nova Iorque.
Dr. DAVID BERNSTEIN, PhD em Medicina e Toxicologia Ambiental pelo Instituto de Medicina Ambiental da Universidade de Nova Iorque e título de mestre de Ciências em Física pela Universidade da Cidade de Nova Iorque.
This slideshow was used to introduce application of Segment Addition Postulate along with Coordinate Plane in Geometry. There is a review of several concepts at the end of the two lessons.
Centroid of a Triangle Formula Properties and Example Questions.pdfChloe Cheney
Learn everything about the centroid of a triangle, including its formula, properties, differences, solved examples, and other frequently asked questions.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. Warm Up
1. What is the name of the point where the angle
bisectors of a triangle intersect?
Find the midpoint of the segment with the
given endpoints.
2. (–1, 6) and (3, 0)
3. (–7, 2) and (–3, –8)
4. Write an equation of the line containing the
points (3, 1) and (2, 10) in point-slope form.
incenter
(–5, –3)
y – 1 = –9(x – 3)
(1, 3)
3. Apply properties of medians of a
triangle.
Apply properties of altitudes of a
triangle.
Objectives
4. median of a triangle
centroid of a triangle
altitude of a triangle
orthocenter of a triangle
Vocabulary
5. A median of a triangle is a segment whose
endpoints are a vertex of the triangle and the
midpoint of the opposite side.
Every triangle has three medians, and the medians
are concurrent.
6. The point of concurrency of the medians of a triangle
is the centroid of the triangle . The centroid is
always inside the triangle. The centroid is also called
the center of gravity because it is the point where a
triangular region will balance.
7. Example 1A: Using the Centroid to Find Segment
Lengths
In ∆LMN, RL = 21 and SQ =4.
Find LS.
LS = 14
Centroid Thm.
Substitute 21 for RL.
Simplify.
8. Example 1B: Using the Centroid to Find Segment
Lengths
In ∆LMN, RL = 21 and SQ =4.
Find NQ.
Centroid Thm.
NS + SQ = NQ Seg. Add. Post.
12 = NQ
Substitute 4 for SQ.
Multiply both sides by 3.
Substitute NQ for NS.
Subtract from both sides.
9. Check It Out! Example 1a
In ∆JKL, ZW = 7, and LX = 8.1.
Find KW.
Centroid Thm.
Substitute 7 for ZW.
Multiply both sides by 3.KW = 21
10. Check It Out! Example 1b
In ∆JKL, ZW = 7, and LX = 8.1.
Find LZ.
Centroid Thm.
Substitute 8.1 for LX.
Simplify.LZ = 5.4
11. Example 2: Problem-Solving Application
A sculptor is shaping a
triangular piece of iron that
will balance on the point of a
cone. At what coordinates will
the triangular region balance?
12. Example 2 Continued
11 Understand the Problem
The answer will be the coordinates of the
centroid of the triangle. The important
information is the location of the vertices,
A(6, 6), B(10, 7), and C(8, 2).
22 Make a Plan
The centroid of the triangle is the point of
intersection of the three medians. So write the
equations for two medians and find their point of
intersection.
13. Solve33
Let M be the midpoint of AB and N be the
midpoint of AC.
CM is vertical. Its equation is x = 8. BN has slope 1.
Its equation is y = x – 3. The coordinates of the
centroid are D(8, 5).
Example 2 Continued
14. Look Back44
Let L be the midpoint of BC. The equation for AL
is , which intersects x = 8 at D(8, 5).
Example 2 Continued
15. Check It Out! Example 2
Find the average of the x-coordinates and the
average of the y-coordinates of the vertices of
∆PQR. Make a conjecture about the centroid of a
triangle.
16. Check It Out! Example 2 Continued
The x-coordinates are 0, 6 and 3. The average
is 3.
The y-coordinates are 8, 4 and 0. The average
is 4.
The x-coordinate of the centroid is the average
of the x-coordinates of the vertices of the ∆,
and the y-coordinate of the centroid is the
average of the y-coordinates of the vertices of
the ∆.
17. An altitude of a triangle is a perpendicular segment
from a vertex to the line containing the opposite side.
Every triangle has three altitudes. An altitude can be
inside, outside, or on the triangle.
18. In ΔQRS, altitude QY is inside the triangle, but RX and
SZ are not. Notice that the lines containing the
altitudes are concurrent at P. This point of
concurrency is the orthocenter of the triangle.
19. The height of a triangle is the length of an
altitude.
Helpful Hint
20. Example 3: Finding the Orthocenter
Find the orthocenter of ∆XYZ with vertices
X(3, –2), Y(3, 6), and Z(7, 1).
Step 1 Graph the triangle.
X
21. Example 3 Continued
Step 2 Find an equation of the line containing the
altitude from Z to XY.
Since XY is vertical, the altitude is horizontal. The
line containing it must pass through Z(7, 1) so the
equation of the line is y = 1.
22. Example 3 Continued
Step 3 Find an equation of the line containing the
altitude from Y to XZ.
The slope of a line perpendicular to XZ is . This
line must pass through Y(3, 6).
Point-slope form.
Add 6 to both sides.
Substitute 6 for y1, for m,
and 3 for x1.
Distribute .
23. Step 4 Solve the system to find the coordinates of
the orthocenter.
The coordinates of the orthocenter are (6.75, 1).
Example 3 Continued
6.75 = x
Substitute 1 for y.
Subtract 10 from both sides.
Multiply both sides by
24. Check It Out! Example 3
Show that the altitude to JK passes through
the orthocenter of ∆JKL.
An equation of the altitude to JK is
Therefore, this altitude passes through the
orthocenter.
4 = 1 + 3
4 = 4
25. Lesson Quiz
Use the figure for Items 1–3. In ∆ABC, AE = 12,
DG = 7, and BG = 9. Find each length.
1. AG
2. GC
3. GF
8
14
13.5
For Items 4 and 5, use ∆MNP with vertices M
(–4, –2), N (6, –2) , and P (–2, 10). Find the
coordinates of each point.
4. the centroid
5. the orthocenter
(0, 2)
26. All rights belong to their
respective owners.
Copyright Disclaimer Under
Section 107 of the
Copyright Act 1976,
allowance is made for "fair
use" for purposes such as
criticism, comment, news
reporting, TEACHING,
scholarship, and research.
Fair use is a use permitted
by copyright statute that
might otherwise be
infringing.
Non-profit, EDUCATIONAL
or personal use tips the
balance in favor of fair use.